Marcus is building a great reference on non-functional requirements at From Start to End. He’s created a series of articles, and keeps adding more. Each post focuses on a single type of non-functional requirement. He just put up an index page for all of his posts, and he’ll be keeping that page updated as he adds more content.
Agile / Product Management / Requirements / Requirements gathering / Software development
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The Agile Dragon
When Alan Cooper and Kent Beck debated the benefits of eXtreme Programming versus Interaction Design, they disagreed on a lot of things. One thing they agreed on is that Agile processes are designed to minimize the impact of changing requirements. Cooper believes that it makes more sense to minimize future change by understanding the requirements better up front. Beck believes that the requirements can not be understood by the team until something is delivered. Beck’s point is that the customer doesn’t understand the requirements until he has something in his hands. We’ve shown how this is both a strength and a weakness for Agile in the real world. In The Hobbit, the dragon Smaug was missing a scale on his belly, that made him vulnerable. Agile processes have a similar weak spot.
Requirements / Software requirements specification
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Joel Spolsky Speaks Specs
It seems that specs are like flossing: everybody knows they should be writing them, but nobody does.
Another for the wish I had said that list. Joel Sposky wrote a four part series on writing functional specifications in Oct 2000. Joel’s opening position is that all projects lasting more than a week, or with more than one developer, will be completed faster with specs than without them. He presents three giant reasons to use a requirements document as part of developing software
Three Giant Reasons
Product Management / Requirements / Requirements gathering / Use Cases
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Challenging Requirements
The hardest long term challenge in eliciting requirements is improving our ability to do it. The hardest short term challenge in gathering requirements is getting all of them. We have a lot of techniques for gathering requirements, from interviewing to brainstorming to researching. How do we know we defined all of the requirements? Everyone who manages requirements knows the value of validating requirements. But validation leaves a blind spot as it looks backwards instead of forwards. We propose to do exactly the opposite.
Process Improvement / Project Management / Software development / Use Cases
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Where Did You Get That Estimate?
How good are our estimates? We can use PERT to estimate the time it will take to implement each requirement. We can use timeboxes to schedule the requirements within each release. If we don’t know how good our estimates are, its an exercise in futility. Scheduling is about more than predicting the future, its about knowing how much faith to have in our predictions.
Communication / Consulting / Product Management / Requirements / Software development / Testing / Use Cases
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Communicate Relevant Quality Metrics
Most teams think about testing in terms of code coverage – what % of the lines of code are covered? What matters to our stakeholders is how well the software works. More precisely, how well does the software let the users work? We should be targeting our quality message in terms of use cases, because that matches their perspective and context.
Communication / Consulting / Outsourcing / Project Management / Requirements / Requirements gathering
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Maine Mangles Medicaid – Charges CIO
Allan Holmes, for CIO Magazine just posted a scathing and detailed autopsy of the disastrous Medicaid Claims System project run by CSNI and launched in January of 2005. Requirements elicitation failures combined with incompetent vendor selection and project mismanagement lead to a $30,000,000 oops for the state of Maine, jeopardizing its credit rating. The system failed to process 300,000 claims in the first 3 months of operations, causing many health care providers to close their doors – and presumably causing citizens of Maine to go without needed services. Maine is the only state in the union (as of April 2005) not complying with federal HIPAA regulations.
Agile / Interaction design / Process Improvement / Product Management / Requirements / Requirements management software / Software development / Use Cases / UX
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Gartner research on Agile Requirements Definition and Management (RDM)
Gartner has a research report available for $95, titled Agile Requirements Definition and Management Will Benefit Application Development (report #G00126310 Apr 2005). The report is 7 pages long and makes an interesting read. Gartner makes a set of predictions for 2009 about requirements definition and management (RDM) systems, and the software created with RDM tools. Gartner misattributes several benefits of good process to RDM tools. We give them a 3.5/7 for their analysis – check out the details here.
Interaction design / Requirements / Requirements management software / Software development / UX
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Persona Grata
Different people approach the same goal very differently. When we don’t truly identify our users, we end up with software that dehumanizes, waters-down, and otherwise fails to succeed at anything more than grudgingly tolerated functionality. Even worse, we may ignore the needs of our key demographic, resulting in software failure. When we use personas instead of generic use cases, we can avoid both the misery of a failed product and mediocrity of marginal success.